Medical tube fastener



FIG. 1 is a front elevational view of a medical tube fastener showing our new design, a rear elevational view being a mirror image of the front;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a medical tube fastener, as shown and described. 